The Capital Gains calculator will look at an individual holding to establish whether a Gain or loss would arise on selling units for that holding.
Capital Gain calculations are not normally simple, because shares are pooled (called ‘section 104 holdings’) and the purchase unit price has to be the average cost of purchasing those units.
Therefore, calculations need to take into account;
- Any disposals / withdrawals / purchases made
- Also where an investment is made into accumulation units, the client is charged to income tax on the deemed distribution (dividends/interest). The distribution is treated as a further investment and so increases the base cost/capital of the holding.
- And you need to identify whether shares have been bought & sold on the same day, or within 30 days (bed & breakfasting).
For further information, see link below to HMRCs help sheet;
